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// *  http://www.apache.org/licenses/LICENSE-2.0                                                                             *
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package org.apache.juneau.jena.annotation;

import static java.lang.annotation.ElementType.*;
import static java.lang.annotation.RetentionPolicy.*;

import java.lang.annotation.*;

import org.apache.juneau.jena.*;

/**
 * Annotation for specifying options for RDF serializers.
 * 
 * <p>
 * Can be applied to Java packages, types, fields, and methods.
 * 
 * <p>
 * Can be used for the following:
 * <ul>
 * 	<li>Override the default behavior of how collections and arrays are serialized.
 * </ul>
 */
@Documented
@Target({PACKAGE,TYPE,FIELD,METHOD})
@Retention(RUNTIME)
@Inherited
public @interface Rdf {

	/**
	 * Marks a bean property as a resource URI identifier for the bean.
	 * 
	 * <p>
	 * Has the following effects on the following serializers:
	 * <ul class='spaced-list'>
	 * 	<li>
	 * 		{@link RdfSerializer} - Will be rendered as the value of the <js>"rdf:about"</js> attribute
	 * 		for the bean.
	 * </ul>
	 */
	boolean beanUri() default false;

	/**
	 * The format for how collections (e.g. lists and arrays) are serialized in RDF.
	 * 
	 * @see RdfCollectionFormat
	 */
	RdfCollectionFormat collectionFormat() default RdfCollectionFormat.DEFAULT;

	/**
	 * Sets the namespace URI of this property or class.
	 * 
	 * <p>
	 * Must be matched with a {@link #prefix() @Rdf.prefix()} annotation on this object, a parent object, or a {@link RdfNs @RdfNs} with the 
	 * same name through the {@link RdfSchema#rdfNs() @RdfSchema.rdfNs()} annotation on the package.
	 */
	String namespace() default "";

	/**
	 * Sets the XML prefix of this property or class.
	 * 
	 * <p>
	 * Must either be matched to a {@link #namespace() @Rdf.namespace()} annotation on the same object, parent object, or a {@link RdfNs @RdfNs} 
	 * with the same name through the {@link RdfSchema#rdfNs() @RdfSchema.rdfNs()} annotation on the package.
	 */
	String prefix() default "";
}
